Thanks Don for quick reply.
The operating pressure during emergency or boat lifting is 150-180 barg and pump has internal bypass relief which sets at 210 barg. This pump internal relief start bypass if pressure increases more than 210barg. I think it is the same as you are talking about i.e...
I am working on hydraulic oil system for life boat winch operations. The hydrulic oil unit will be operted once in a year for 2-3 hours for testing purposes otherwise it will remain closed until unles in emergency to lift the boat at the platform from sea.
The maximum operating pressure will be...
